Results 31 to 40 of about 13,872,756 (390)

Vitamin B-12 [PDF]

open access: yesAdvances in Nutrition, 2010
Vitamin B-12 is a cofactor for 2 enzymes. In the cytoplasm, methionine synthase requires vitamin B-12 in the form of methylcobalamin and catalyzes the conversion of homocysteine to methionine by transfer of a methyl group from methyltetrahydrofolate. This enzyme links the methylation pathway through synthesis of the methyl donor S-adenosyl methionine ...
openaire   +3 more sources

B vitamins and cognitive performance in older adults: Review [PDF]

open access: yes, 2013
A copious amount of scientific scrutiny has been dedicated to documenting typical and atypical human ageing, with a substantial body of work focusing upon the impact of lifestyle choices.
Reay, Jonathon   +2 more
core   +3 more sources

Impact of Methyl-Donor Micronutrient Supplementation on DNA Methylation Patterns: A Systematic Review and Meta-Analysis of in vitro, Animal, and Human Studies

open access: yesLifestyle Genomics, 2023
Background: DNA methylation patterns are directly associated with diverse metabolic disorders. The status of methyl-donor micronutrients has been associated with DNA methylation levels, and altered ingestion of folate, choline, betaine, B vitamins and ...
Jhulia Caroline N.L. da Mota   +7 more
doaj   +1 more source

Which circulating antioxidant vitamins are confounded by socioeconomic deprivation? The MIDSPAN family study [PDF]

open access: yes, 2010
<p><b>Background:</b> Antioxidant vitamins are often described as having “independent” associations with risk of cancer, cardiovascular disease (CVD) and mortality.
Alex McConnachie   +35 more
core   +4 more sources

Effect of B-complex vitamins on the antifatigue activity and bioavailability of ginsenoside Re after oral administration

open access: yesJournal of Ginseng Research, 2017
Background: Both ginsenoside Re and B-complex vitamins are widely used as nutritional supplements. They are often taken together so as to fully utilize their antifatigue and refreshing effects, respectively.
Yin Bin Chen   +8 more
doaj   +1 more source

Evaluation of Extrusion Temperatures, Pelleting Parameters, and Vitamin Forms on Vitamin Stability in Feed

open access: yesAnimals, 2020
Two experiments were conducted to determine the stability of microencapsulated and non-microencapsulated forms of vitamins in diets during extrusion and pelleting. We investigated the recovery of vitamins in swine diets after extrusion at 100 °C, 140 °C,
Pan Yang   +3 more
doaj   +1 more source

Stroke: roles of B vitamins, homocysteine and antioxidants [PDF]

open access: yes, 1999
19 páginas, 1 figura, 2 tablas.In the present review concerning stroke, we evaluate the roles of B vitamins, homocysteine and antioxidant vitamins. Stroke is a leading cause of death in developed countries.
Diez, Elena   +6 more
core   +1 more source

Urinary excretion of B-group vitamins reflects the nutritional status of B-group vitamins in rats

open access: yesJournal of Nutritional Science, 2013
We have reported previously that the urinary excretion of B-group vitamins reflects recent dietary intakes of these vitamins. We also proposed reference values for the urinary levels of B-group vitamins for human subjects, and used these for evaluating ...
Katsumi Shibata   +3 more
doaj   +1 more source

Dietary Intake of Homocysteine Metabolism-Related B-Vitamins and the Risk of Stroke: A Dose-Response Meta-Analysis of Prospective Studies

open access: yesAdvances in Nutrition, 2020
Observational studies regarding the putative associations between dietary intake of homocysteine metabolism-related B-vitamins (vitamin B-6, folate, and vitamin B-12) and stroke risk have yielded inconsistent results. Thus, we conducted a systematic meta-
Liyun Chen   +5 more
semanticscholar   +1 more source

Does taking vitamin, mineral and fatty acid supplements prevent cognitive decline? A systematic review of randomized controlled trials [PDF]

open access: yes, 2008
Background Observational studies have shown associations between nutritional status and cognition in later life but evidence from intervention studies is unclear.
Avenell, Alison, Jia, X, McNeill, G
core   +1 more source

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